Method of casting hollow concrete masonry



' F. SELMER METHOD OF CASTING HOLLOW CONCRETE MASONRY April 2s, 1925.'

Filed IMaj' v, 192s bmw Patented Apr. 2d, 1925.

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METHOD OF CASTING HLLV CNCBETE IVIASNRY,

application filed May 7,

Be it known thatel, Ingenieurlinnninn Snmrnn, `of l-lausmannsgt. 34A, Christiania, Norway, a subject of the King of Norway,

have invented certain new and useful lmy proveniente .in Methods of Casting Hollow terconnection between the inner and outer walls of said masonry. This object. is attained by the use of interconnecting 1nembers as reinforced concrete braces or stays (diagonal stays, cross stays), which are cast and hardened beforehand in a concrete cast- .ing plant. These interconnecting members are then with their ends cast into the inner and outer walls, in the usual way by the aid of molds.

In this manner it is possible to undertake the comparatively dithcult and complicated casting of the braces or stays in a plant suited for such manufacture, thereby simplifying the erection of the walls on the build ing site, where it is only necessary to cast the inner and outer walls in the usual way,

and insertthe ends of the braces or stays in the respective walls.

In the accompanying drawings are shown various forms of masonry erected in accordance with this method, in which.`

Fig. l is a vertical section through a hollow wall provided with diagonal stays,

Fig. 2 is a corresponding section of'aiwall provided with cross stays, i

Fig. 3 is a modification of the form shown in Fig. 2, and y Fig. l is a vertical section showing besides 'the vertical stay system also a similar horizontal stay system.

la lfig. l, l is the outerand 2 the inner wall of the masonry. rlhese walls are in well known manner cast by the aid of mold `plates or sections (not shown). According to my invention l insert as the casting progresses diagonal cement stays 3 provided 1923. `Serial No. 637,321;

with a reinforcenientiIl` (indicated in dotted lines). rllie end part of these stays in-` serted in the walls is suitably made of the same width as these walls, and the ends may suitably be provided with horizontal holes 5 for the insertion of the horizontal rods of the inner and outer walls respeto tively. As will be seen from the drawings the rod 4 extends around these holes 5 so as vto establish a secure connection between the rods of the inner and outer walls, said vconnections transmitting tensions and pressures direct from the horizontal rods of the one wall to the other. The invention is, however, not limited to this use of holes in the `stays or braces 3 for the bracing of the walls.

In Fig. 2 there is used instead of the diagonal stays 3 cross stays 7 provided with crossed reinforcements 8 (shown in dotted lines). According to lTig. 3 the method differs from that of F ig. 2 only therein, that the cross stays 7 are` not placed directly adjoining each other, but are placed at' suitable intervals, said intervals preferably corresponding to the height of a scaffolding plate. In this ligure there is also illustrated the use of vertical ribs 9 and l0 respectively, along the vertical planes in which the cross stays arevplaced. This is a particularly' suitable form for the method.

In the modification illustrated in Fig. l vertically placed diagonal stays 3 are used corresponding to those of Fig. l, and also horizontal stays 12 are inserted, which may beof the saine form as the stays 3 or of any other suitable form.

By the above method there is formed a kind of lattice-work or framework girder construction between the inner and outer `walls, whereby an efficient interconnection between the outer and inner side of the wall is provided.

l claim: y

l. A method of casting hollow concrete masonry which consists in the successive steps of arranging in a mold reinforced con `crete stay members having laterally extending end portions provided with perforations;` inserting reinforcing rods through the perforations of said end portions; and casting the inner and outer walls around said end portions and said reinforcing rods,` whereby the total width of the hollow inasonry is determined by the lateral distance between the outer faces of the end portions.

mamen between the outer faces of the end portions, and the outer Jface of the Walls Will be Hush with the outer ends of the end portions.

In testimony that I claim the foregoing 15 as my invention, I have signed my name in presence of two subscribing Witnesses.

FREDRIK SELlt/ER.

lWitnesses hAGNUss BEIQQE, GULBORG GULBRANDSEN. 

